body {
  padding: 50px;
  font: 14px "Lucida Grande", Helvetica, Arial, sans-serif;
  background-image: url(../images/back.jpg);
}

a {
  color: #00B7FF;
}
.wrap{
  width: 500px;
  margin: 60px auto;
  background-color: #99a;
  opacity: 0.9;
  border-radius: 5px;
  font-size: 16px;
}
h1{
  font-size: 36px;
  color: #333;
  text-align: center;
  padding: 10px 5px;
}
.user{
  text-align: center;
  padding: 10px 0;
}
input{
  outline: none;
  border: 1px solid #999;
  border-radius: 3px;
}
#username,
#password{
  padding: 5px;
}
.log{
  padding: 30px;
}
#login{
  display: block;
  text-decoration: none;
  margin: 30px auto;
  width: 210px;
  height: 30px;
  color: #fff;
  font-size: 16px;
  text-align: center;
  background-color: #4b7385;
}